Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release

Details Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release

2007-02-28

arxiv.org/abs/astro-ph/0702754v1

Astron.J.134:26-42,2007

Astronomy and Astrophysics

Astrophysics

accepted for publication in the Astronomical Journal; 46 pages, 2 figures, 4 tables

Scientific paper

10.1086/517878

We present the culmination of our near-infrared survey of the optically spectroscopically identified white dwarf stars from the McCook & Sion catalog, conducted using photometric data from the Two Micron All Sky Survey final All Sky Data Release. The color-selection technique, which identifies candidate binaries containing a white dwarf and a low mass stellar (or sub-stellar) companion via their distinctive locus in the near-infrared color-color diagram, is demonstrated to be simple to apply and to yield candidates with a high rate of subsequent confirmation. We recover 105 confirmed binaries, and identify 28 firm candidates (20 of which are new to this work) and 21 tentative candidates (17 of which are new to this work) from the 2MASS data. Only a small number of candidates from our survey have likely companion spectral types later than M5, none of which is an obvious L type (i.e., potential brown dwarf) companion. Only one previously known WD + brown dwarf binary is detected. This result is discussed in the context of the 2MASS detection limits, as well as other recent observational surveys that suggest a very low rate of formation (or survival) for binary stars with extreme mass ratios.

Affiliated with

Also associated with

No associations

Rating

Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-524334